<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
  </head>
  <body>
    <div id="app"></div>
  </body>
</html>
<script>
  const vm = new Vue({
    // el: '#app',
    template: `
       <h1>{{ name }}</h1>
    `,
    data: {
      name: '王伟伦',
    },
  });

  setTimeout(() => {
    vm.$mount('#app');
  }, 2000);
</script>
